Lexington, TX has a population of 1,185 and is the 14,102nd largest city in the United States. The population density is 955 per sq mi which is 885% higher than the Texas average and 954% higher than the national average. The median age in Lexington is 43 which is approximately 25% higher than the Texas average of 34. In Lexington, 64% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 82% of Lexington residents were born in Texas, 14% were born out of state, 3% were born outside of the United States and 1% were foreign born.